I am trying to build a JavaScript form using radio buttons and trying to achieve a
watering time calculator using 2 sets of information.
1. 4 different systems
2. 3 different types

All systems + type1 = the variable totals represented below
All systems + type2 = are multiplied by 2
All systems + type 3 = are multiplied by 3.5
If the 'largeplants' check box is selected the total needs to be multiplied by 1.5

The calculateTime function needs to calculate the watering time on click & display an alert box stating the watering time
& The reset button needs to reset the radio buttons.

var type1 //watering time for sand with all systems
var type2 = * 2; //watering time for loam with jetspray/sprinkler/minisprinker/dripper
var type3 = * 3.5;//watering time for clay with jetspray/sprinkler/minisprinker/dripper